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Gradients of Rectification: Tuning Molecular Electronic Devices by the Controlled Use of Different-Sized Diluents in Heterogeneous Self-Assembled Monolayers

Authors
Kong, Gyu DonKim, MisoCho, Soo JinYoon, Hyo Jae
Issue Date
22-8월-2016
Publisher
WILEY-V C H VERLAG GMBH
Keywords
dilution effects; EGaIn junctions; molecular electronics; rectifiers; self-assembled monolayers
Citation
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.55, no.35, pp.10307 - 10311
Indexed
SCIE
SCOPUS
Journal Title
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume
55
Number
35
Start Page
10307
End Page
10311
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/87796
DOI
10.1002/anie.201604748
ISSN
1433-7851
Abstract
Molecular electronics has received significant attention in the last decades. To hone performance of devices, eliminating structural defects in molecular components inside devices is usually needed. We herein demonstrate this problem can be turned into a strength for modulating the performance of devices. We show the systematic dilution of a monolayer of an organic rectifier (2,2'-bipyridine-terminated n-undecanethiolate) with electronically inactive diluents (n-alkanethiolates of different lengths), gives remarkable gradients of rectification. Rectification is finely tunable in a range of approximately two orders of magnitude, retaining its polarity. Trends of rectification against the length of the diluent indicate the gradient of rectification is extremely sensitive to the molecular structure of the diluent. Further studies reveal that noncovalent intermolecular interactions within monolayers likely leads to gradients of structural defect and rectification.
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